Maybe I should point out the purpose of the site.
On that page you start on the left, the link:
Start your journey here if you
DO NOT KNOW
which board you own!
You are presented a form you should fill in as much as possible. Then you hit the search button on the bottom right of the page. You are presented a list of possible matches for your board with little pictures you can click on. You can then compare those with your own board and make a match.
Based on your bios string alone I would say the M598LMR:
http://www.amptron.com/html/m598lmr.html